Method and system for detecting passage of objects

An object and polarization direction technology, which is applied in the field of detecting the passage of objects and its system, can solve the problems of increasing the construction cost of the detection system and increasing the power loss of the detection system, and achieve the effect of reducing the construction cost and reducing the power loss of the system.
CN103679090BInactive Publication Date: 2016-12-21CHINA STEEL
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA STEEL
Publication Date
2016-12-21
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method and system for detecting the passage of an object. The method includes the following steps: (a) providing an object passage area; (b) setting a wireless identification reader on one side of the object passage area. The wireless identification reader has a first polarized antenna. The first polarized antenna can transmit a first polarized wave to a metal part of a passing object. The metal part can reflect the first polarized wave and convert the first polarized wave. Converting the polarized wave into a second polarized wave with the opposite polarization direction; and (c) setting a wireless identification tag in the reflection direction of the first polarized wave, the wireless identification tag having a second polarized antenna, the The polarization direction of the second polarized antenna is opposite to the polarization direction of the first polarized antenna, so that the second polarized antenna can receive the second polarized wave and activate the wireless identification tag, thereby determining Object passes.
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Description

technical field

[0001] The present invention relates to an object detection method and its system, in particular to a method and its system for detecting the passage of an object. Background technique

[0002] It is known that most of the methods for detecting the passage of objects are based on optical detection methods, such as the "method for detecting the passage of objects" disclosed in my country's Announcement Patent No. I242652, which uses a plurality of light-emitting elements and a plurality of receiving elements to form a detection system, and Interpretation of the passage of objects is performed using the light-interception method. However, the aforementioned optical detection method uses a considerable number of light-emitting and receiving elements, resulting in a significant increase in the construction cost of the detection system. In addition, a large number of light-emitting and receiving elements will also greatly increase the power consumption of the dete...

Claims

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